E85 flex fuel capability - 6SpeedOnline - Porsche Forum and Luxury Car Resource

#1

01-20-2019, 10:24 AM

Bookshelf

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E85 flex fuel capability

I’m guessing there is no way to have flex fuel capability with the stock ECU? What are the options as far as aftermarket ecu’s? I know there is ProEFI, we have been running e85 for 10 years in my brother’s Supra. I would like to have flex fuel capability due to E85 around here being anywhere from 70-85%. Thanks

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#2

01-20-2019, 03:57 PM

3llooi

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Syvecs is an option.

ESmotor installed it on my car.

Also AIM performance did quite few E85 997.1
tuned by Emre at ESmotor

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#3

01-21-2019, 10:10 AM

A418t81

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There's been no confirmation that the stock ECU is not capable of flex fuel with the appropriate code/ROM development done to enable such a function, but that fact remains that the market for it is very, very small (and therefore unlikely to happen). Grab an AccessPort and flash back and forth between the two is the best mobile option right now short of going standalone.

Last edited by A418t81; 01-21-2019 at 10:12 AM.

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#4

01-21-2019, 10:19 AM

997TurboTom

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on e85, my range is about 160 miles per full tank. For a long drive I was able to fit two 5 gallon fuel jugs into the front trunk. Realistically you won't be switching around fuel types often enough to need flex fuel, and you shouldn't tune for the ragged edge of ethanol content anyway. Buy a fuel test kit and figure out which local gas station has the highest ethanol content fuel and use that:

Amazon

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#5

01-22-2019, 08:00 AM

Mark @ AIM Performance

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Quote:

Originally Posted by Bookshelf

I’m guessing there is no way to have flex fuel capability with the stock ECU? What are the options as far as aftermarket ecu’s? I know there is ProEFI, we have been running e85 for 10 years in my brother’s Supra. I would like to have flex fuel capability due to E85 around here being anywhere from 70-85%. Thanks

Syvecs has flexfuel capability.- that is what I use in my car. I don't see Flexfuel coming to stock ECU any time soon even though it is possible with this ECU.

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997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
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#6

01-22-2019, 11:07 AM

Bookshelf

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Is anyone using proEFI on here?

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#7

01-23-2019, 07:38 AM

o7silverturbo

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Quote:

Originally Posted by Bookshelf

Is anyone using proEFI on here?

Dont bother with proEFI thats old news.

Im running the syvecs flex fuel is great since you dont have to worry about switch between tunes like with the cobb

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#8

01-23-2019, 07:45 AM

Mark @ AIM Performance

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Quote:

Originally Posted by Bookshelf

Is anyone using proEFI on here?

using mine as a paperweight.

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997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
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#9

01-23-2019, 09:04 AM

Bookshelf

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What makes ProEFI bad on a Porsche?

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#10

01-25-2019, 08:16 AM

jhbrennan

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Quote:

Originally Posted by Bookshelf

What makes ProEFI bad on a Porsche?

I think it's E85 that's "bad" not the ProEFI - engine wasn't designed to run E85 on a regular basis. I wouldn't buy a 997 that has run E85...but that's just me.

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#11

01-25-2019, 08:28 AM

Mark @ AIM Performance

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Quote:

Originally Posted by jhbrennan

I think it's E85 that's "bad" not the ProEFI - engine wasn't designed to run E85 on a regular basis. I wouldn't buy a 997 that has run E85...but that's just me.

nothing bad or wrong with using E85 in this engine.

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#TeamAIM
997TT SilverSpool - 210.8 mph 1/2 Mile WR Apr 2019, 9.2 @ 168 mph 1/4 Mile Manual World Record , 3.15 60-130 mph , 2.72 100-150 mph , 1400whp E85
996TT SpoolBus - 204.6 mph 1/2 Mile 996TT WR Aug 2018, 9.5 @ 154 mph, 3.23 60-130 mph, 2.5 100-150 mph Manual Porsche World Record, 1400whp E85
997TT SlowBerry - 205.0 mph 1/2 Mile WR Nov 2018, 9.7 @ 170 mph 1/4 Mile , 3.2 60-130 mph , 2.4 100-150 mph , 1420whp E85
ESMOTOR | DO88 | TPC DSC | SYVECS | COBB | IPD | KLINE | XONA | AMS | ID | ERP | SACHS | TURBOSMART | CSF | DODSON |

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#12

01-25-2019, 09:25 AM

o7silverturbo

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Quote:

Originally Posted by jhbrennan

I think it's E85 that's "bad" not the ProEFI - engine wasn't designed to run E85 on a regular basis. I wouldn't buy a 997 that has run E85...but that's just me.

e85 doesnt hurt the engine at all. Just have to make sure its tuned for it

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#13

01-25-2019, 09:26 AM

Bookshelf

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We went from running race gas to E85 in the Supra 10 years ago and have had zero problems. The E85 is used up and the car gets put away with 93 every winter. Haven’t had any problems with ProEFI either, and use traction control, anti lag, flex fuel etc

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#14

02-02-2019, 02:30 AM

TT.BRN

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Quote:

Originally Posted by Bookshelf

What makes ProEFI bad on a Porsche?

Nothing basically bad with the ProEfi, its one of few ems out there that actually is fully can integrated, its the goto for LS swaps into 996/997 cars for a reason, in the hands of a capable tuner it will do everything you need and more. But, unless you get it for a bargain there is no reason to go with it (or AEM's infinity) if buying new, the syvecs is just a better bang2buck deal ...

Some details:
New, a basic Proefi PnP setup would run 4-4.5K$ .. Basic 112 setup no flexfuel or hd coils, this kit only logs with a laptop, 1K$ for their screen to log into a usb! Same with AEM basic setup harness and ems is 4.5K$ without any sensors.

Now, a basic S6+ runs around 4.5K$ too (S6/harness/noid/fuelp/map/egt's), you dont need too many extra sensors since it runs on all stock sensors, and it logs all the time internally (not an option) for upto 8hrs ... Faster processor, better support, its just a better system on paper and in reality ...

Cheers

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